insertelementaction.java

报表设计软件,很好的

/**
 * ========================================
 * JFreeReport : a free Java report library
 * ========================================
 *
 * Project Info:  http://www.jfree.org/jfreereport/index.html
 * Project Lead:  Thomas Morgner ([e-mail]);
 *
 * (C) Copyright 2000-2003, by Simba Management Limited and Contributors.
 *
 * This library is free software; you can redistribute it and/or modify it under the terms
 * of the GNU Lesser General Public License as published by the Free Software Foundation;
 * either version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
 * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License along with this
 * library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
 * Boston, MA 02111-1307, USA.
 *
 * ------------------------------
 * InsertElementAction.java
 * ------------------------------
 * (C)opyright 2003, by Thomas Morgner and Contributors.
 *
 * Original Author:  Thomas Morgner;
 * Contributor(s):   David Gilbert (for Simba Management Limited);
 *
 * $Id: InsertElementAction.java,v 1.2 2004/04/20 18:54:54 taqua Exp $
 *
 * Changes
 * -------------------------
 * 08.11.2003 : Initial version
 *
 */

package org.jfree.designer.visualeditor.actions;

import java.awt.event.ActionEvent;
import javax.swing.Action;

import org.jfree.designer.util.AbstractDesignerAction;
import org.jfree.designer.visualeditor.VisualEditPanel;
import org.jfree.report.Band;
import org.jfree.report.Element;

public final class InsertElementAction
        extends AbstractDesignerAction
{
  private final VisualEditPanel editPanel;
  private final Element prototype;

  /**
   * Defines an <code>Action</code> object with a default description string and default
   * icon.
   */
  public InsertElementAction (final VisualEditPanel editPanel,
                              final Element prototype,
                              final String name)
  {
    this.editPanel = editPanel;
    this.prototype = prototype;
    putValue(Action.NAME, name);
  }

  /**
   * Invoked when an action occurs.
   */
  public final void actionPerformed (final ActionEvent e)
  {
    final Element element = editPanel.getSelectedElement();
    if (element == null)
    {
      return;
    }
    final Band parent;
    if (element instanceof Band)
    {
      parent = (Band) element;
    }
    else
    {
      parent = element.getParent();
      if (parent == null)
      {
        return;
      }
    }
    final Element newElement = createElement();
    parent.addElement(newElement);
    editPanel.getDataRow().connectDataSource(newElement);
    editPanel.reportDefinitionChanged();
  }

  protected final Element createElement ()
  {
    try
    {
      return (Element) prototype.clone();
    }
    catch (CloneNotSupportedException cne)
    {
      throw new IllegalStateException("Clone not supported by element?!");
    }
  }
}